11481777191 has 2 divisors, whose sum is σ = 11481777192. Its totient is φ = 11481777190.

The previous prime is 11481777149. The next prime is 11481777217. The reversal of 11481777191 is 19177718411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11481777191 - 2⁶ = 11481777127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11481707191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5740888595 + 5740888596.

It is an arithmetic number, because the mean of its divisors is an integer number (5740888596).

Almost surely, 2^11481777191 is an apocalyptic number.

11481777191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11481777191 is an equidigital number, since it uses as much as digits as its factorization.

11481777191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 47.

The spelling of 11481777191 in words is "eleven billion, four hundred eighty-one million, seven hundred seventy-seven thousand, one hundred ninety-one".